Stoping machine



May 31, 1932. e. M. NELL STOPING MACHINE Filed June 12. 1930 I N VENTOR.

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FAQ-1 Patented May 31, 1932 UNITED; PATENT? l GUSTAVE M; LNELLJOE "J'JETROITIMICHIGAN; 'AssIGNoR TO moirmonsmencon OOMPANY; OF NEW YORK'NAY; A CORPORATION OF ITE'RsEY T 7 sTjOPINe This invention relates to selif rotated stop ,ing machines operated byfluid pressure and more particularly to -the feedingnieans for the percussive -motor of isuch a anach-ine;

5 This application is a division-wof my--.gopencl.-

ing applicationSerial N o;'-353,209;-filed- -Ap1;il

6, 1929;? under the-title ifstoping drills:

a feeding :device for selfvrotated s'topers-an 1o ranged. to prevent the a entire -machine' from rotating iwhen :thedrill steel becomes, stuck.

Another; Object .7 is to enable the machine; to

be .rotated manually through a sufficient arc to aid inloosening astuck drill 'steele: Other objects vwill be apparenti from the detailed description which follows.

In rorderwtoi illustrate- :the invention 1 one concrete embodiment thereof is I shown in the accompanying dravvings in-vvhich- Fig.;. ,1 is a vertical sectional view illustrat ing a stoping dr-ill in position for ;Operation,;-.

Fig 2 is a transverse seotionaL-vievv n an enlarged scale substantially on -thelinel 2+2 of.-Fig. ,l;-vandz tiallyi' onthe .lin'e '3-.v-8 of Fig. :1. i

The :stoping-drill' disclosed ih'zFigi" 1 com;-

Fig. 3 isl'a detaill sectional view substan-g MACHINE secured tO-mOtor1A, and memb'erwS a iston-s5 -:-slidab1e withincylinder? and having astems 8a,- the' end ofxvvh-ichprojectsr atballawtimes;

beyond cylinder-7. The feedingcdeviceds;ar-+

1 ranged to prevent a rotation *of the=-motoi"j A i When'the steel a becomes stuck and to; permit-r 60 -a limited ainountof rotativemovement relae'l:-

z-vtive' to the support so th'atrthe operatonanay la utilize han dle" to' assistr-in freeing ;the,i-steelw.+-:

The: telescoping parts 'comprisin-gwfeedings device- 13, 'namelycylin'denf, and pistOn' 8 arranged for relative axial movement butare:

r-maintained against relative -rotative* *mov. 7-

usedvvhic h "involves'ra nut 19a secured intheiw :pouteriend' Of 'cylinder 7, 'asa'byaa' threadedien-vivo gage nent having sinvvard-ly directed splines -or r1bs1?b' slidably received in -l-'ongit;udinal w slots. 861m the exterior of; pistonwstenrv 8m =21 threaded thereinto or otherwisefixedly 'se cured to the s ame; vvhich-extension may "hav a a spurs22' 'forcengaging a; supporting surfacev- ,are i B Piston stem 1 8a is providedavvith :an-extension I prises-ta percussive motor A adapted to L im part blowsand to-rotate a drill 'ste'ela sup; ported the .-for ward 2 end thereof and i a w. An' enlarged portion aofextension 21-hasa J 'bore 23 therethrough .transverse to the axifsa of the ma'chinep This bore-is fia'red or'fan 80 feeding. deviceor motor 13 (for advancing the percussive motor and the steel to the work. While the percussive-motor may a have inde-. pendent imeansforlrotatingathe drill steel, it isshown-i as provided'iwviththe vvell known riflebarrotationmechanism Since the per:- cussive motor-may be of any .suitable 01': deg sired. type, further description thereot is Omitted. p

Aliandle projects. fromthe machine. to be. grasped'qby the operatorin directing the' machine :to .the igwvorkuandain controlling its operation. Handle-:0 is also.used,to free the machine when the drill steel d becomes a "stuck in the formation which isqbei-ng. drilled. Sincemotor A is ofv the self-rotating type, sticking of the, steeli-tendsto cause theentire machinez to rotateunless isuitable means; are provided toprevent-itr I I 69* The feeding.- deviceashovvn is of the fluid shaped: divergently from its; centre as; shownw 1n FlgeB. "Through bore 23 extendsea footwfi p1ece 2l in the form' ofr a rod havi-ing bent eral pivotal connection with-pistonextensiona 21 since the fan'ning or flaring of the-'bore 23c" permits a restricted iamou-nt of rotativ-e niove; c

' inent of the entire machineonfoot piece- 24 i This enables the operator tO-rock themaeh ine 7 scribed-in Whatis IIOWUOIISI thefeof'but covers "all changegmodifibations'y and adaptations within the scope-or thap pended'cla'i'ms;"' r

2.;In combination, a rock drill having a percussive motor, and a feeding device for advancing the motor to the work comprising an extensible member, a foot piece on said memberfor engagement with a supporting surface at a plurality of points, and means connecting said foot piece to said member and providing for limited rotative movement of the latter relative to said foot piece.

3. In combination, a rock drill having a percussive motor, and a pressure feeding device therefor comprising telescoping members having a keyed connectionwith each other permitting relative movement in an axial direction but not in a rotative sense, and means on one of said members for engaging a supporting surface and for resisting rotative movement thereonbut permitting lim' ited rotative movement of said last named member relative to said means.

4, In combination, a rock drill having a percussivemotor, and a pressure fee-dlng device therefor comprising a cylinder secured to said motor, a piston slidable within said cylinder and having a stem projecting therefrom, cooperating means on said cylinder and on said stem maintaining the same against relative rotation, and means on said stem for engaging a supporting surface at two spaced points and providing for limited rotative movement of said stem in the plane which includes said stem and said points.

5. In combination, a rock drill having a percussive motor, and a pressure feeding device therefor comprising a cylinder secured to said motor, a piston slidable within said cylinder and having a stem projecting therefrom, a member secured in the end of said cylinder establishing a keyed connection with said stem, and means on said stem for engaging a supporting surface at two spaced points and providing for limited rotative movement of said stemin the plane which includes said stem and said points. x

6. In combination, a rock drill having a percussive motor, and a pressure feeding device comprising telescoping members having a splined connection permitting relative axial movement, means for engaging a supporting surface in a fixed position, and means r interposed between said first named means and one of said members providing for a limited amount of relative rotative movement.

7. In combination, a rock drill having a percussive motor, and a pressure feeding ,device comprising telescoping members having a splined connection permitting relative axial movement, one of said members being secured other of saidmembers having a spur for engaging a supporting surface, and means extending laterally from said extension to engage the supporting surface and having a loose connection with said extension;

9. In combination, "a rock drill having a percussive motor, and a pressure feedingdevice comprising telescoping members having a splined connection permitting relative axial movement, one of said members being secured to said drill, an extension on the other of said members having a spur for engaging a supporting surface, and a foot piece extending laterally'from said extension and having a spur to engage the supporting surface,'said foot piece providing for limited movement of said extension relative thereto."

10. In combination, a rockdrill having a percussive motor, and a pressure feeding device comprising telescoping members having a splined connection permitting relative axial movement, one of'said members being secured to said drill, a spur on the end of the other member for engagement with a supporting surface, and a foot piece extending laterally from said other member having a spur to engage the supporting surface in spaced relation to said. first spur, said foot piece providing for limited rotative movement of said other memberrelative thereto.

11. In combination, a rock] drill having a" percussive motor, and a pressure feeding device comprising telescoping members having a splined connection permitting relative axial movement,'one of said members being'secured to said drill," an extension on theother of said a having means maintalning the same against relative rotative movement, one ofsaid members being adapted to be secured to the, drill, and means on the end of the other member for engaging a supporting surface including a foot piece mounted on said member for limited pivotal movement relative to the latter.

13. A pressure feeding device for a percussive motor comprising telescoping members having a splined connection permitting relative axial movement, one of said members being adapted to be secured to the motor, and means on the end of the other member for engagmg a supporting surface including a bore therethrough and a foot piece extending loosely through said bore and having means to engage a supporting surface at a point in spaced relation to the axis of said device.

14. A pressure feeding device for a rock drill comprising telescoping members having means maintaining the same against relative rotative movement, one of said members being secured to said drill, an extension on the other of said members having a spur for engaging a supporting surface, said extension having a bore therethrough flared or fan shaped divergentlyfrom its center, and a foot piece extending through said bore and having spurs at its ends either of which may engage the supporting surface in spaced relation to said extension spur.

Signed by me at Detroit, in the county of l/Vavne and State of Michigan, this 4th day of vJune, 1930. i

GUSTAVE M. NELL. 

